Heavy oil anti-blocking device for submersible electric pump protector
A technology of submersible electric pump and protector, which is applied in the direction of pump control, machine/engine, liquid variable capacity machinery, etc. It can solve the problems of abnormal production, damage and blockage of submersible motor, and improve the resistance of heavy oil Blocking ability, reasonable structure, and the effect of prolonging the service life
Active Publication Date: 2016-09-07
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology
[0005] In order to overcome the disadvantages that the breathing hole of the protector of the electric submersible pump is blocked by the heavy oil block in the heavy oil production, the submersible motor is damaged, the production cannot be carried out normally, and the cost of heavy oil exploitation remains high. The present invention provides a submersible pump. Thick oil anti-blocking device for oil pump protector
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[0013] The present invention will be further described below in conjunction with drawings and embodiments. However, those skilled in the art should know that the present invention is not limited to the specific embodiments listed, as long as it conforms to the spirit of the present invention, it should be included in the protection scope of the present invention.
[0014] See attached figure 1 . The thick oil anti-blocking device of the electric submersible pump protector of the present invention comprises an upper joint 4, a capsule 18, a capsule shell 9, a shaft 7, a stirring wheel 2, and a sieve plate assembly 3, and the upper joint 4 is fixedly connected with the capsule shell 9, The upper end of the shaft 7 passes through the axial through hole of the upper joint 4 from the capsule shell 9 and is connected with the shaft of the oil-gas separator through a spline sleeve 17, and a mechanical seal assembly 14 is installed between the shaft 7 and the upper joint 4; the upper...
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The invention relates to a heavy oil blockage preventer for a protector of an electric submersible pump and aims to overcome the defects that blockage of a breather of the protector by heavy oil mass during use of the electric submersible pump in heavy oil production causes damage of the electric submersible pump and causes failure of normal production. A stirring wheel and a screen plate assembly are fixedly mounted on a shaft in an inner cavity of an upper connector from top to bottom; the upper connector is provided with two radial through holes over the stirring wheel; an outflow one-way valve and an inflow one-way valve are fixed in the radial through holes, respectively; a screen plate of the screen plate assembly is fixed to the end face of a fixing sleeve through screws; the screen plate is in the shape of a round plate and provided with axial mesh pores. The heavy oil blockage preventer has the advantages that the structure is reasonable, heavy oil blockage resistance of the protector can be improved, chances that the breather of the protector is blocked by the heavy oil are slimmed or avoided, the service life of the protector is prolonged, the exploration of heavy oil, super-heavy oil and extra-heavy oil wells is better suited, and the service of an electric submersible pump unit is prolonged.
Description
technical field [0001] The invention relates to a submersible electric pump protector for oil and gas development oil pumping equipment, in particular to a heavy oil anti-blocking device for the submersible electric pump protector. Background technique [0002] The submersible electric pump downhole unit is mainly composed of a multi-stage centrifugal pump, an oil-gas separator, a protector, and a submersible motor connected from top to bottom. The shells are connected with flange screws, and the shafts Connect with spline sleeve. [0003] The function of the protector is to compensate the loss of lubricating oil in the motor, balance the internal and external pressure of the motor, prevent the well fluid from entering the motor and bear the axial load of the pump. The main types of protectors are connected type, precipitation type and capsule type. The advantages of the capsule protector: the capsule is used to isolate the well fluid and the motor lubricating oil. As long...
Claims
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IPC IPC(8): F04B49/10
Inventor 吴频周海邢厚伟傅鹏李维维王宏杰
Owner BC P INC CHINA NAT PETROLEUM CORP